¹     In May 1980 the earth shook. A mountain called Mount St. Helens blew up. The heat melted snow. Snow and ash mixed and made mud. The mud ran down the hills very fast. Many trees fell. Everything was knocked over.
 
²     The mud ran into the Toutle River. The river flooded. Trees were knocked down. Logs broke things. Homes floated on the river. Farm animals died. People died. The mud ruined many things.
 
³     People were careful. Some people had left the mountain before it blew up. Some people did not leave. They put masks over their noses. The masks kept the ash out of their lungs.

Paragraphs 4 to 5:
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